20920000

素因数分解:

$2^6\times 5^4\times {\mathrm{523}}^1$

素因数の和:555

約数の個数: 70

約数和(自身を含む): 51973988

約数和(自身を除く): 31053988

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 500, 523, 625, 800, 1000, 1046, 1250, 1600, 2000, 2092, 2500, 2615, 4000, 4184, 5000, 5230, 8000, 8368, 10000, 10460, 13075, 16736, 20000, 20920, 26150, 33472, 40000, 41840, 52300, 65375, 83680, 104600, 130750, 167360, 209200, 261500, 326875, 418400, 523000, 653750, 836800, 1046000, 1307500, 2092000, 2615000, 4184000, 5230000, 10460000, 20920000]

約数ペア:

[(1, 20920000), (2, 10460000), (4, 5230000), (5, 4184000), (8, 2615000), (10, 2092000), (16, 1307500), (20, 1046000), (25, 836800), (32, 653750), (40, 523000), (50, 418400), (64, 326875), (80, 261500), (100, 209200), (125, 167360), (160, 130750), (200, 104600), (250, 83680), (320, 65375), (400, 52300), (500, 41840), (523, 40000), (625, 33472), (800, 26150), (1000, 20920), (1046, 20000), (1250, 16736), (1600, 13075), (2000, 10460), (2092, 10000), (2500, 8368), (2615, 8000), (4000, 5230), (4184, 5000)]